Dehydrogenative amide synthesis from alcohol and amine catalyzed by hydrotalcite-supported gold nanoparticles
作者:Jiangling Zhu、Yan Zhang、Feng Shi、Youquan Deng
DOI:10.1016/j.tetlet.2012.04.048
日期:2012.6
Hydrotalcite-supported nano-gold (Au/HT) was found to be a highly efficient heterogeneous catalyst for the dehydrogenative synthesis of amidefromalcohol and amine. Amines and alcohols with different structures could be converted into the amides under mild reaction conditions with up to 98% isolated yields. Mechanism exploration suggested that ester might be the reaction intermediate.
Superparamagnetic Fe(OH)<sub>3</sub>@Fe<sub>3</sub>O<sub>4</sub> Nanoparticles: An Efficient and Recoverable Catalyst for Tandem Oxidative Amidation of Alcohols with Amine Hydrochloride Salts
nanoparticles were successfully prepared and characterized. This magnetic nanocomposite was employed as an efficient, reusable, and environmentally benign heterogeneous catalyst for the direct amidation of alcohols with aminehydrochloridesalts. Several derivatives of primary, secondary and tertiary amides were synthesized in moderate to good yields in the presence of this catalytic system. The catalyst was
磁性Fe(OH)3 @Fe 3 O 4纳米粒子的制备和表征成功。该磁性纳米复合材料用作将醇与胺盐酸盐直接酰胺化的有效,可重复使用且对环境无害的多相催化剂。在该催化体系的存在下,以中等至良好的产率合成了伯,仲和叔酰胺的几种衍生物。该催化剂已成功回收利用,最多可重复使用六次,而不会显着降低其催化活性。
Manganese Catalyzed Direct Amidation of Esters with Amines
作者:Zhengqiang Fu、Xinghua Wang、Sheng Tao、Qingqing Bu、Donghui Wei、Ning Liu
DOI:10.1021/acs.joc.0c02478
日期:2021.2.5
metal catalyzed amidations remains a challenge. Here, a manganese(I)-catalyzed method for the direct synthesis of amides from a various number of esters and amines is reported with unprecedented substrate scope using a low catalyst loading. A wide range of aromatic, aliphatic, and heterocyclic esters, even in fattyacid esters, reacted with a diverse range of primary aryl amines, primary alkyl amines
Phenylsilane as been reassed as useful coupling reagent for amides synthesis. Peptides and Weinreb amides are easily obtained under mild conditions in absence of epimzerization even with challenging substrates such as phenylglycine. Further investigation regarding the reactivity of stable acetoxysilanes supported phenylpolyacyloxysilane as key intermediate.